December in Ann Arbor averages a daily high of 3°C with nights around -4.6°C. Expect roughly 16.9 wet days totalling 71.4mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Ann Arbor is May–June.
Based on ANN ARBOR SE, MI US (5.6km), 1995–2024. 22 years of December data.